用温度计测水的温度时，将手伸进水中觉得不冷不热，水的温度大约是______℃；用

起落架重力放出后，如绿系统压力可用，哪个系统会失效（）

A.刹车系统

B.前轮转弯系统

C.停留刹车系统

D.以上系统均会失效

.

The UN Environment Programme says that rising temperature could mean the end for some

migrating animals.Migrating or mobile animals move through several environments as they travel away from the cold of winter to warmer areas. Birds may fly from one part of the world to another, perhaps stopping at feeding grounds(聚食场) on the way. Whales and turtles cover vast areas of ocean. The report says that changes in any one of the places which these animals use can cause serious harm."Obviously these animals have developed their traveling patterns over thousands of years. But climate change is almost certain to be extreme over the next 25 t0 50 years, and it is extremely

unlikely that these animals can change their habits fast enough," said the report author Dr. Robert Hepworth.

Hardest hit by rising temperatures are turtles. Scientists have found that at higher temperatures,turtles produce far more female eggs than male ones. In parts of Malaysia, turtle birthing sites are producing only females, the report says, It also provides evidence that some turtles are more likely to develop cancer as the waters get warmer.

With birds, the main problem is climate-related damage to important areas at either end of the travels or at resting places along the way. About one-fifth of migrating birds are now in danger because of climate-related changes including rising sea levels, land loss and more violent storms,the report concludes.Other animals picked out as particularly in danger include:

◆the North Atlantic Right Whale, whose main food( tiny shrimp ) is disturbed by the change in ocean flows

◆the White-beaked Dolphin, which is out-competed by other kinds of dolphins in warmer waters.

The report is not all bad news. Even with major climatic changes, protecting the environment can still help mobile animals to recover.

"We need governments to start taking action at the national and international level. The clock is running." said Dr Hepworth. And some animals are already adapting, with the report mentioning whales that are changing their feeding behavior, finding new feeding grounds and new foods to eat.

48. What does the text mainly talk about?

A. The effect of climate change on migrating animals,

B. How animals are adapting to changes in temperature.

C. The importance of saving migrating animals.

D. The need for government policies to prevent global warming.

49. Which of the following is mentioned as a consequence of rising temperatures?

A. More storms will affect the ability of whales to find their feeding grounds.

B. 20% of all birds are likely to die out because of land loss.

C. Migrating animals can adapt to the changes quickly.

D. Warmer oceans will increase the competition between different kinds of dolphins.

阅读“细胞中的糖类和脂质”一节的材料，回答问题。课前准备：把学生每四人分为一组，准备各种糖（少量），不得少于五种，鼓励种类越多越好，意在调动学生的好奇心和求知欲，积极参与并查阅资料了解糖的知识，为课堂上能轻松地突破难点作好铺垫，同时也为能更好地理解和掌握糖的有关知识做准备。教学过程：师生互动：让学生四人为一小组阅读教材“细胞中的糖类”的内容，并归纳整理知识结构。通过谈话、自学归纳总结，学生认识了糖类的种类和作用后，让学生以小组为单位，把课前准备的各种糖进行归类，并能说出每种糖在生物体细胞中的作用。教师给完成得快而且好的小组的全组同学在发展性评价的学习情感、态度和个性化评价栏中记录一次A。学生：分组讨论、交流并积极完成任务。

根据材料回答问题：（1）根据材料，分析该教师的教学设计中主要使用了哪种教学策略？运用这种教学策略时，应注意的问题有哪些？（2）生物课堂中还要注意教学方法的选择，常用的教学方法有哪些？选择的依据是什么？

焦炭的有效成分是（）

A、固定碳

B、灰分

C、挥发分

D、水分

在模拟环境下，常采用黑盒测试检验所开发的软件是否与需求规格说明书一致。其中有效性测试属于（）中的一个步骤。

A．单元测试

B．集成测试

C．确认测试

D．系统测试